Thread cutter for looms



Dec. 8, 1931.

o. v. PAYNE 1,835,324

THREAD CUTTER FOR LOOMS Filed Dec. 9, 1950 F [15.1 H w RR I 11L 1 rr 35L '1 so -wa an ilo \fi :3 "WU/ 3 H01 sr-z. b 5o jivvE/vv'cm 0554/? MFAYNE cessed clamping plunger 24 (Fig.

Patented Dec, 8, 1931 UNITED STATES oFFicE OSCAR v. PAYNE, orwoncns'rnn, MAssAo iifsn sJessIGNoR To cnoivrrrron & KNowLE-s LOOMWORKS, or WonoEsTEa, vmssnoiwsnms fli coRron-eTIoN .OF

MASSACHUSETTS THREAD CUTTER ro'itnooivts Application filed DecemberIfil'o. 5011380 ii Thisinvention relates to a thread cutter for use inautomatic looms, designed for cutting weft ends closely adjacent thecloth selvage. I

More particularly, the cutter is designed for cutting the weft endsextending from the selvage to an end holder of a magazine or to a threadcutting and gripping device on a shuttle placer.

It is the object of my invention to provide an improved thread cutterfor such purposes, so designed that the thread will be cut when the layis at back center, thus avoiding the possibility of dropping the weftend on the shuttle race of the lay, where it may be car- 7 ried into thewarp shed.

My invention further relates to arrangements and combinations of partswhich will be hereinafter described and more particularly pointed out inthe appended claims. 7 g

A preferred form of the invention is shown in the drawings, in whichFigure 1 is a plan view of portions of a loom embodying my improvedthread cutter;

Fig. 2 is a sectional side-elevation of the parts shown in Fig. 1; s

Fig. 3 is an enlarged sectional side elevation of the cutter and itssupport, taken along the line 33 in Fig. 1; and 7 Figs. 4 and 5 aresectional rear elevations, taken along the lines H and 55 in Fig. 2.

Referring to the drawings, I have shown a portion of a breast-beam 10, alay lland a cutter-supporting bar 12 yieldingly mounted in brackets. 13on the breast beam 10. My improved thread cutter is mounted on a stand2O slidable on the bar 12 and adapted to-be clamped'in adesiredposition'by tightening a nut 22, threaded on the outer end of a{3e- 3 tightening the nut 22, thevstand 20 can be secured in anyselected axial or angular posi-j sition on the bar 12;

An angle bracket or cloth support 26 is secured to one side of the stand20 and extends under the adjacent selvage of the cloth, as indicated inFig. 1.

A pair of cutter bars 30 and 31 are loosely mounted on a stud 32extending through the cutter bars 30 and 31 and through acorresponc'ling 'ope'ninfg in thestand '20. The cutt er bar 30lias anopening34 (Fig. 5) which 7 fits looselyiover the head of a stud or rivet35' securedinth inner facev of the bracket 26.

The cutter bar 30 is thus held from angularmoveinent and"acts as a fixedcutting blade. A two-armed lever 40 is loosely pivoted 011 the stud 32and its provided with'a stud or rivet 42'extending' into anopening 43 inthe cutter blade 31. The blade 31 isthus mounted Vforangular*movementwith the lever 40.

spring' i l (Figs. 2 'and5) is seated in pockets in a lowersurfaceof'the stand 20and i'n' an upper surface of the lever '40 and acts topress the lever T0 and its associatedcutter bar 31 downward to the openposition shown in Fig. 2. second spring 4C6 (Fig. t) is mounted in apocket 47 in the side of the lever 40 and forces the inovablecutter bar31 yield-' ingly' against the cut ting' face of-the lixed cutter bar 30.

A'st'rap 50 is Samar at 51 to a depending end of the lever 40 and issecured at 52 to the front side of the lay 11.

Having described the details of construction of my improved threadcutter, the operation thereof is as follows:

The cloth C is drawn forward by the takeup mechanism over the bracket26, and the weft ends Wfrom the end holder or the shuttle placer will bedrawn between the open jaws of the thread cutter, as indicated in Fig.2.

As the lay 11 moves rearward and approaches back center, the strap 50 istightened and thereupon swings the movable cut- 7 ter bar 31 upwardrelativeto the fixed cutter bar 30, thus severing the weft ends at thefell the cutter bars 30 and 31 can be easily removed for sharpening orreplacement.

Having thus described my invention and the advantages thereof, I do notWish to be limited to the details herein disclosed, otherwise than asset forth in the claims, but What I claim is v i 1. In a loom, a threadcutter, a stand, a stud mounted in said stand, a lever, a fixed cuttingbar, and a movable cutter bar, said three parts being mounted on saidstud, and said bars having openings remote from the axis of said stud,and transversely extending pins mounted in said stand and leverrespectively and extending loosely into the openings in adjacent cutterbars, whereby one bar is fixed to said stand and the other bar issecured to said lever and both bars are readily removable andreplaceable after the supporting stud is removed.

2. In a loom, a thread cutter mounted in a fixed position adjacent thecloth selvage and having fixed and movable cutter bars extendingrearward, a lever connected to said movable cutter bar, and a flexiblemember directly connecting said lever to the lay, through which membersaid lever and movable cutter bar are continuously connected at alltimes to said lay and are operated to cut the weft ends by the directaction of the lay as the lay moves rearward and approaches back center,said member forming a lost motion connection as the lay approaches frontcenter.

In testimony whereof I have hereunto affixed my signature.

OSCAR V; PAYNE.

